const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const jwt = require('jsonwebtoken');
const secret = require('./secret');

const indexRouter = require('./routes/index');
const usersRouter = require('./routes/users');
const loginRouter = require('./routes/login');
const autoprefixerRouter = require('./routes/autoprefixer');
// const spriteRouter = require('./routes/sprite');

const app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'www')));
app.use('/public',express.static(path.join(__dirname, 'public')));

const toKenMaxAgeSecond = 600 //cookie 最多有效期是多少秒

app.use((req,res,next) =>{
  // var html = fs.readFileSync(path.resolve(__dirname,'gt/dist/index.html'),{encoding:'utf-8'});

  // return res.sendFile(path.resolve(__dirname,'gt/aioAdmin/index.html'))
  if(req.path == '/login'){
    next();
  }
  else{
    if(!req.cookies.token) return res.redirect('/login');
    
    let decoded = jwt.verify(req.cookies.token, secret);
    // 假设用户名及密码验证不通过，则一样去登录
    if(!decoded.user && !decoded.password) return res.redirect('/login');
    // 延时cookie
    let token = jwt.sign({...decoded,iat:Math.floor(Date.now() / 1000) + (toKenMaxAgeSecond)}, secret);
    res.cookie('token', token, {maxAge: toKenMaxAgeSecond * 1000, httpOnly: true})
    next();
  }
})
app.use('/login', loginRouter);
app.use('/users', usersRouter);
app.use('/autoprefixer',autoprefixerRouter);
// app.use('/sprite', spriteRouter);
app.use('/', indexRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
